..................by using Z table.
=0.0301
(300) students whose lengths follow normal natural distribution of the mean ( u = 165 cm)...
300) students whose lengths follow normal natural distribution of the mean (u = 165 cm) and a standard deviation ( 0 = 8 cm ) then: The probability of selecting student whose length less then( 160 cm) equals ?
A manufacturer produces widgets whose lengths are normally distributed with a mean of 6.8 cm and standard deviation of 2.1 cm. A. If a widget is selected at random, what is the probability it is greater than 6.8 cm.?_____ B. What is the standard deviation of the average of samples of size 36 ?______ C. What is the probability the average of a sample of size 36 is greater than 6.8 cm?_______ Round answer to four decimal places
A manufacturer produces widgets whose lengths are normally distributed with a mean of 9.9 cm and standard deviation of 3.7 cm. A. If a widget is selected at random, what is the probability it is greater than 9.7 cm.? B. What is the standard deviation of the average of samples of size 41 ? C. What is the probability the average of a sample of size 41 is greater than 9.7 cm? Round answer to four decimal places.
A factory produces pistons whose diameters follow a normal distribution with a mean of 50 mm and a standard deviation of 0.01 mm. For a piston to serve, its diameter must be between 49.98 and 50.02 mm. If the diameter is less than 49.98 mm it is rejected; if it is greater than 50.02 mm, it is reprocessed once and the new diameter follows a normal distribution of an average of 49.99 mm, a standard deviation of 0.01 mm. I....
A factory produces pistons whose diameters follow a normal distribution with a mean of 50 mm and a standard deviation of 0.01 mm. For a piston to serve, its diameter must be between 49.98 and 50.02 mm. If the diameter is less than 49.98 mm it is rejected; if it is greater than 50.02 mm, it is reprocessed once and the new diameter follows a normal distribution of an average of 49.99 mm, a standard deviation of 0.01 mm. I....
A manufacturer produces widgets whose lengths are normally distributed with a mean of 17.3 cm and standard deviation of 2 cm. A. If a widget is selected at random, what is the probability it is greater than 17.4 cm.? Round to dour decimal places B. What is the standard deviation of the average of samples of size 32 ? Round answer to four decimal places C. What is the probability the average of a sample of size 32 is greater...
If the SAT scores of students in a high school follow the normal distribution with mean = 1200 and standard deviation = 100, what is the probability that a randomly selected student's score is between 1000 and 1400? OA 0.9973 B. 0.9545 OC. 0.9999 OD. 0.6827 Reset Selection
A manufacturing process makes rods that vary slightly in length but follow a normal distribution with mean length 25 cm and standard deviation 2.60. What is the probability of randomly selecting a rod that is shorter than 22 cm? P(X<22)=P(Z< ) = Round your z-score and probability to four decimal places. The time a song plays on the radio varies from song to song. The time songs play varies according to a normal distribution with mean of 3.2 minutes and a...
The grade point averages of the students in a large statistics class follow a normal distribution with a mean of 3.0 and a standard deviation of 0.25. What is the probability that a randomly sampled student from this class has a GPA of less than 2.95? (hint: you will need to use the table on page 175)
The height of a male college freshman has a normal distribution with mean 71 inches and standard deviation 3 inches. What is the probability of selecting a student whose height is between 72 and 75 inches?